I sure wish there was something like this for Eclipse and Aptana! Perhaps this could be a start? Here’s to hoping…! 
Facebook Platform Developer Forum / TextMate FBML plugin
Put together a start of a TextMate Bundle for Facebook. Does some cool stuff, like code completion and doc lookup. If anyone wants to contribute, ping me and I’l put you on the project.http://code.google.com/p/facebooktextmate/
Filed under: cool, dev, facebook, fbml, plugin, textmate, tip, tool
